On the heels of a five-state primary sweep, and declaration that he is the Republican nominee, Mitt Romney officially received the backing of the Republican National Committee on Wednesday. 

The announcement means the merging of the two group's campaign infrastructures.

“Governor Romney’s strong performance and delegate count at this stage of the primary process has made him our party’s presumptive nominee,” said RNC Chairman Reince Priebus. “In order to maximize our efforts I have directed my staff at the RNC to open lines of communication with the Romney campaign.”

This year, the RNC has raised $35.5 million, as compared to the $46.5 million raised by the Democratic National Committee. The RNC finished March with $32.7 million and $9.9 million in debt.

Already, the DNC and President Obama have been working together for a year, and have dozens of field offices in swing states. 

Romney's lead in delegates has left little reason for his last remaining competitors, Newt Gingrich and Ron Paul to continue, though Romney is still shy of the 1,144 needed to formally clinch the nomination. 

Romney also hinted at his future campaign strategy on Tuesday in claiming the Republican nomination. 

"It's still about the economy, and we're not stupid," he said, playing on a phrase Bill Clinton used during his 1992 presidential campaign against George Bush. 

New York Mag commented on Romney's strategy:

"Mitt Romney delivered a new version of his speech last night. The main argument is very, very simple: The economy has been bad since 2009, and voters should blame President Obama. This is almost certainly the correct strategy for Romney, yet it requires him to craft a case that neither he nor his party actually believes."

Preibus, the RNC chairman, spoke to Newsmax on Wednesday, and said that the five easy wins in New York, Pennsylvania, Rhode Island, Delaware and Connecticut signify that the Republican party has finally backed Romney. 

"I think so. I think that Republicans, conservatives, tea party, everything in between, we’re ready to go, and Mitt Romney is the presumptive nominee of our party."

See the video of the interview with Preibus below: